The short answer is no, Clovis and Charlemagne were not directly related, but they were connected through a broader royal lineage.
Clovis I, the King of the Franks from 481 to 511, is often considered the founder of the Merovingian dynasty. He played a crucial role in unifying the Frankish tribes under one ruler and is known for his conversion to Christianity, which laid the foundation for the future integration of the Frankish kingdom with the Roman Catholic Church.
Charlemagne, also known as Charles the Great, reigned from 768 to 814 and was part of the Carolingian dynasty, which succeeded the Merovingians. Charlemagne was a direct descendant of Charles Martel, who was a major domo of the Frankish realm and the grandfather of Charlemagne. The Carolingians eventually came to power after the decline of the Merovingians, and Charlemagne expanded the Frankish empire significantly, becoming the first emperor in Western Europe since the fall of the Western Roman Empire.
While Clovis and Charlemagne are separated by several generations, they are part of the same historical and political legacy of the Frankish kingdoms. Their reigns marked important turning points in European history, with Clovis establishing the foundations for the Frankish nation and Charlemagne furthering that legacy by expanding and solidifying its power.